Welding jig for broken drills



Nov. 2, 194s. w. J. SU'TTQN 2,453,046

` WELDING `JIG FOR BROKEN DRILLS Filed April 5, 1946 2` Sheets-Sheet 1 INVENTORI `Wam/@p J. 507mm;

@n-wlw@ i/ HIS ATTORNEY.

Nov. 2, 1948.

w. J. SUTTON WELDING JIG FORV BROKEN DRILLS Filed April 5, 1 946 l 2` Sheets-Sheet 2 INVENTOR: /4// a@ ,J W70/V,

ATTORNEY.

Patented ov. 2, 194g UNITED STATES;

l vWELDING HG( FOR BROKEN'DRILLS" Willard` J5. Sutton, r Gary;` Ind. Application April5`, 1946,` Serial No. 6595935" The presentinvention` relatesI to a` novel construction and arrangement of the component partsof ai welding" jig peculiarly well suited for use'in 'repairing broken drills"` on similar elongatedparts" which "require being united-:in axialV align-- meniby'meansof aweidedjointn zolaims. (ci.` 11a-99.)`

j `tion at the" right extremity inf which broken parts cfa drill canJ bef gripped injaccurate valignment inpreparation for welding Another-"objectjof"the invention is`` to provide a weldingjigincludingabed'with one standfrigidly n securedthereto` andcarrying Aa` fixedcworl:` engaging jaw' and another-stand freely-slidable on the bed alsocarryingI a jaw; thetwo' yjaw frames `being equipped `with' means forA clamping the pieces to be welded; The further lobj ect is to providea jig including abed having twofstands `mounted there`` on, `one of which is rigidly secured tothe bed and the other of' whichn isu -slidalcleg` relatifvetnereto,` so l asto allowfor'a slightrelative`4 movement between theftwcr'stand's' in order to compensate for "variai tionsfin-tli'e length-of the finished, welded-workpiece due1 tothe welding heat or'to' contraction which occurs'upon-coolingof thesteelv after completionoithewerldingl The aboveL and future featuresI of the AinventionA willbemoreA fullyapparent from a consideration of* the*V followingdetailedt disclosure and the appen'ded'claimswhen read` in connection-with theU accompanying drawings A in which:

P'igured3 isv asideelevation of" awelding jig ex-` emplifyingthe `hereinclaiinedinventiom n Figure 2i is a section onV lineV II`IIf of' Figure 1.

Figure Blis'a Isection on 1ine"III-'III ctligurey 2; Fig-uref` 4- iscanv elevation as viewed from the'4 right-sideofiFigure 2'.

Figures 6 and 7 are detail perspective views of" shieldingr members: forwpr'otecting parts of the jig from the welding flame. l

Referring more particularly` to the drawings, improved jig: comprisestwo stands- C i and D mounted on a common bed E which=is adapted tov be rigidly i'secured to a turntable El having a central trunni'onV E2 mounted in any suitable upright, bearing. The standscC' and D are substantial `duplicates Y of `one another, theakcli'ief` l 2f. fastened' thereto-by means of jscrews 3.

diameter than the `shank portion `at the? left;

Such `a relationship between the cutting-portion of the'drill and the shank is conventional asitA permits thelch'ips cutlby the drill to work their' way tothe surface of the work. The jigof the`r` presentoinvention is` 'peculiarly well suitedl for welding broken drills and provides meansfor accuratelyvcompensating for differencein diametersf ofthe drill and the rshank portion of'theworkfA piece; i

The jaw iframe `i in the stando normauyy Xedlysecured to thestandL whereas the correa"` sponding jaw frame in thestand Dv is mounted" in such a wayasto provide forlverticalad'justln ment` The description ofthe component parts of the stand `D-will *sufce also forthe-parts-"ofl stand?` and `since the parts as above mentionedl are substantial duplicates, accordingly, tlieduplil cate parts have been identied by thesanie referi ence numerals in thedrawings. Asfshown,` the stand Dl-consists of alcarriage `I having rsideiguides The side guidesl 2' are .providedy at their lower extremi# ties kwithl` inwardljT extending projectionsyma-` l chined to lmakefa sliding t withthe over-hangingpartsofi the bedlEas clearly shown` in Figur-e229 The pottorrrjaw` frame 4 has a work-receiving* notch 5; cut inthe` top lthereof-so as tc forml a selfcentering seat for a cylindrical workpiece;

such, for example, as the body of the drill which is `represented by the circle shownin` dot and dash*` lines in Figure 2. Thejaw frame 4 has a rack 6' secured thereto, which meshes with a pinion 'ly secured tofanV operating shaft 8 having a handler l el adapted to be turnedso as tomove thev jaw frame upor down as desired. pAfterproper verti-` cal-i adjustment of the frame 4 has beenmade, t`

is adaptedi tobe locked in positionl bymeans of a screw` lll having a hand wheel-l I-secured there* towwhich presses'on awasher |.2fso that when-thescrew islturnedkuptightthe jaw `frame 4 is firmly clamped in the position towhich'- it had been adjusted `loyfmanipulation of the pinion 1V. allow for vertical adjustmentof the jawframe,`

the. latter: is' formed with aoslot E41 so that the" shaft .Sawillinot interfere witlr thefree lup-anclf` i down;` movement during themaking of vertical adjustments. Asi indicated at I 5, I provide a guideblock which serves asa-guide for tl'ifeJframe 4 andprovdes a" bearing frthe shaft 8l.I This v guidenblockr idf is fastened to =the carriage by meanslof side plates `i6 andlscrews` |21" as shown. A slotii i8 is formed in the jawt framellandserves asta guideffor a1 clampmember indicated at i9.-

Thiswclamp member is f formed withL lower and TENT oFPlc-EI f thereofv being-oflarger f aisaoie upper V-shaped notch'es adapted to engage large and small diameter drills. The clamp I9 issecured pivotally by pin 23 to a clamp holder` 22 which has a vertical shank carrying nut 24 by means of which the clamp h'older can be adjustably suspended from a post 25 which is adjustably secured to the jaw frame 4 by means of a locking bar- 26, In order to provide for the vertical adjustment of the post 25 I utilize a screw Z'Icarrying a hand wheel 28. When the screw 21 is released or loosened by proper manipulation of the hand wheel, the post 25 may be lowered a sucient distance to engage the notch 20 of the clamp I9 with the periphery of the large diameter or Working portion of the drill. The locking bar 26 is then tightened by manipulation of the screw 2l. The bar 26 at thel time of adjustment pivots around a screw 29, the arrangement being such that there is slight clearance between: the jaw frame Li andthe locking bar 26 so; that when the locking screwv 2l' is loosened, the locking bar`25 is loose on the pivot screw 29. Afterl the kpost 25 has lbeen adjusted over the drill and lockedin position the` upper end of the clamp holder 22 willvbe contacting the post Y25. In order to exert suiicient pressure on the drill to securely hold itin place, I provide a pressure nger 30 which isvpivoted on a pin 3l secured to a lug projectingupwardly from the post 25. The member 36 has an extension threadedto receive a setgscrew 32- and the lower end of the set screw bearsagainst a notched seat 33 formed in the post A,Ztras clearly shown in Figure 2. By manipulating the-knurl-ed head of the set screw, the required pressure on the drill may be readily obtained and afterV welding of the drill i-s :completedftlie pressure may. be quickly released by retracting the set screw.

,In normal operation after the drill and the sh'ank portion thereof are lined up or set in readiness for the welding'operation, shields F and G, such as shown in detail, in Figures 6 and.

7 are positioned in the locations illustrated in Figurel so as to protect the working parts of the jig from theV intense heat of the welding flame. Prior topositioning the drill and shank portions to be united, the ends of the same are usually ground to form blunt chisel points as indicated at a: in YFigure l. In lining up the two parts in the jig, the flat surfaces of the chisel points are advantageously placed in Vertical position so that the Welding may be completed from the sides rather than from below. Because the construction and arrangement of the .component parts of the device shown and described, it will be apparent that the stand D is freely slidable on the bed This is considered important as it permits limited relative motion between the stands C and D as a result of expansion caused by the welding heat and also permits the stand D to slide toward the stand C as the heat from the weld dissipates upon cooling and results in a contraction of the steel. The preferred design is that in Vwhich-the entire stand C is one solid block with the notched jaw frame 4 formed as an integral part of the carriage. this case is stationary and the stand C is rigidly secured to they bed E by means of the screws 3 as shownl The design of the post, th'e clamp, and locking mechanism attached to the post is identical to that described in connection with the The V-groove in stand D. When locking a drill with a tapered shank in the device, a sleeve having a tapered hole iittingV the drill shank and a cylindrical eX- terior is required. This provides the most accurate alignment of drill and the shank since the only adjustment in aligning the two parts to be welded is a vertical adjustment which is readily accomplished by manipulation of the pinion 1. If desired, an alternative means for gripping the tapering shank of a drill in the stand D..could be made available by making the stand in two parts including a bottom jaw pivotally mounted l so as to be adjustable -to suit th'e angle of the taper.

cal embodiment of the invention which a reduction to practice has demonstrated to be highly desirable, it i-s to be understood that various modifications may be made by those skilled at the art without departing from the invention as deiined in the appended claims.

Iclaim:

1.. A jig for holding metal work pieces in alignment for welding comprising a bed,a. first 4.upright stand Xed to said bed, a second uprightH stand slidably carried by said bed and,` being freely movable toward and away from said rst stand, ajaw xed to one of saidstands and having a Work receiving-notch, a jaw'carriedlbyhe other stand for vertical adjustment and lhafvisrigy-a work receiving notch, rack and pinion means fand.`

clamp means carried by the stand havinglthe ad While I have illustrated and described a practi- -justable ljaw for effecting adjustment of thisfjaw and fixing its position, posts carried b-y eachof` said stands for verticaladjustment and having` varms overhanging the work receiving notches of y said jaws, work clamps carried by said arms and being cooperable with said jaws for `clamping v work pieces, and fingers fulcrumed toV saidarm's,` for engaging and releasing said work clamps from the work piece.

2. A jig for holding metal `work pieces in align-fv ment for welding comprising a bed, a first upright stand xe'd to said bed, a second upright" stand slidably carried by said bedand lbeing freely movable toward and away from said first stand, a jaw fixed to one. of said stands and having a Work receiving notch, a jaw vcarried bythe other stand for vertical adjustment and Vhaving 'a work receiving notch, rack and pinion means andl clamp means carried by the stand having the., adjustable jaw for effecting adjustment of-th'isvjaw and fixing its position, posts carried by each of said stands for vertical adjustment and having arms overhanging and spaced above the work receiving notches of said jaws, workclamps adjustably suspended from said arms and having notches cooperable with the notches in saidjaws for clamping work pieces, and :lingers fulcrumed1 to said arms and engageable with said work clamps for xing said work clamps in clamping position. I

WILLARD J. SUTTON;4 l REFERENCES CITED y Y The following references are of record in the file of this patent:

UNTTED STATES PATENTS Y' 2,021,336 Swartz Nov. 19, 1935 

